Long-Term Debt - Summary of the Bancorp's Long-Term Borrowings (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020	May 05, 2020	Jan. 31, 2020	Oct. 28, 2019	Mar. 22, 2019	Jul. 26, 2018	Mar. 14, 2018	Jun. 15, 2017	Mar. 15, 2016	Nov. 20, 2013	Mar. 07, 2012
Debt Instrument
Long-term debt	[1]	$ 11,821	$ 14,973
Amount Qualifying as Tier Two Capital for Regulatory Capital Purposes
Debt Instrument
Long-term debt		2,500	2,800
Parent Company
Debt Instrument
Long-term debt		$ 7,927	7,761
Parent Company | Senior Notes | Floating Rate 0.70% Notes Due 2021
Debt Instrument
Interest rate (as a percent)		0.70%
Long-term debt		$ 0	250
Parent Company | Senior Notes | Fixed Rate 2.60% Notes Due 2022
Debt Instrument
Interest rate (as a percent)		2.60%								2.60%
Long-term debt		$ 700	699
Parent Company | Senior Notes | Fixed Rate 3.50% Due 2022
Debt Instrument
Interest rate (as a percent)		3.50%											3.50%
Long-term debt		$ 500	499
Parent Company | Senior Notes | Fixed Rate 1.625% Notes Due 2023
Debt Instrument
Interest rate (as a percent)		1.625%		1.625%
Long-term debt		$ 499	498
Parent Company | Senior Notes | Fixed Rate 3.65% Notes Due 2024
Debt Instrument
Interest rate (as a percent)		3.65%
Long-term debt		$ 1,496	1,494
Parent Company | Senior Notes | Fixed Rate 2.375% Notes Due 2025
Debt Instrument
Interest rate (as a percent)		2.375%				2.375%
Long-term debt		$ 748	747
Parent Company | Senior Notes | Fixed Rate 2.55% Notes Due 2027
Debt Instrument
Interest rate (as a percent)		2.55%		2.55%
Long-term debt		$ 746	746
Parent Company | Senior Notes | Fixed Rate/Floating Rate Notes Due 2027
Debt Instrument
Interest rate (as a percent)		1.707%
Long-term debt		$ 496	0
Parent Company | Senior Notes | Fixed Rate 3.95% Notes Due 2028
Debt Instrument
Interest rate (as a percent)		3.95%							3.95%
Long-term debt		$ 647	647
Parent Company | Subordinated Debt | Fixed Rate 4.30% Notes Due 2024
Debt Instrument
Interest rate (as a percent)		4.30%										4.30%
Long-term debt		$ 749	748
Parent Company | Subordinated Debt | Fixed Rate 8.25% Notes Due 2038
Debt Instrument
Interest rate (as a percent)		8.25%
Long-term debt		$ 1,346	1,433
Subsidiaries
Debt Instrument
Long-term debt		3,894
Subsidiaries | FHLB Advances Due 2021 to 2047
Debt Instrument
Long-term debt		$ 44	67
Subsidiaries | FHLB Advances Due 2021 to 2047 | Lower limit
Debt Instrument
Interest rate (as a percent)		0.05%
Subsidiaries | FHLB Advances Due 2021 to 2047 | Upper Limit
Debt Instrument
Interest rate (as a percent)		5.87%
Subsidiaries | Other Debt Due 2021 to 2041
Debt Instrument
Long-term debt		$ 284	262
Subsidiaries | Variable Interest Entity, Primary Beneficiary | Fixed-Rate Notes Due 2022 to 2026 | Automobile Loans
Debt Instrument
Long-term debt		$ 250	623
Subsidiaries | Variable Interest Entity, Primary Beneficiary | Fixed-Rate Notes Due 2022 to 2026 | Automobile Loans | Lower limit
Debt Instrument
Interest rate (as a percent)		2.03%
Subsidiaries | Variable Interest Entity, Primary Beneficiary | Fixed-Rate Notes Due 2022 to 2026 | Automobile Loans | Upper Limit
Debt Instrument
Interest rate (as a percent)		2.69%
Subsidiaries | Senior Notes | Fixed Rate 2.25% Notes Due 2021
Debt Instrument
Interest rate (as a percent)		2.25%
Long-term debt		$ 0	1,249
Subsidiaries | Senior Notes | Fixed rate 2.875% Notes Due 2021
Debt Instrument
Interest rate (as a percent)		2.875%
Long-term debt		$ 0	849
Subsidiaries | Senior Notes | Fixed Rate 3.35% Notes Due 2021
Debt Instrument
Interest rate (as a percent)		3.35%
Long-term debt		$ 0	506
Subsidiaries | Senior Notes | Floating Rate 0.655% Notes Due 2021
Debt Instrument
Interest rate (as a percent)		0.655%
Long-term debt		$ 0	300
Subsidiaries | Senior Notes | Floating Rate 0.772% Notes Due 2022
Debt Instrument
Interest rate (as a percent)		0.772%
Long-term debt		$ 300	300
Subsidiaries | Senior Notes | Fixed Rate 1.80% Senior Notes Due 2023
Debt Instrument
Interest rate (as a percent)		1.80%			1.80%
Long-term debt		$ 649	648
Subsidiaries | Senior Notes | Fixed Rate 3.95% Notes Due 2025
Debt Instrument
Interest rate (as a percent)		3.95%						3.95%
Long-term debt		$ 795	836
Subsidiaries | Senior Notes | Fixed Rate 2.25% Notes Due 2027
Debt Instrument
Interest rate (as a percent)		2.25%			2.25%
Long-term debt		$ 598	598
Subsidiaries | Senior Notes | Fixed Rate 4.00% Notes Due 2027
Debt Instrument
Interest rate (as a percent)							4.00%
Subsidiaries | Subordinated Debt | Fixed Rate 3.85% Notes Due 2026
Debt Instrument
Interest rate (as a percent)		3.85%									3.85%
Long-term debt		$ 748	748
Subsidiaries | Subordinated Debt | Fixed Rate 4.00% Notes Due 2027
Debt Instrument
Interest rate (as a percent)		4.00%
Long-term debt		$ 172	172
Subsidiaries | Junior Subordinated Debt | Floating-Rate Debentures Due 2035
Debt Instrument
Long-term debt		$ 54	$ 54
Subsidiaries | Junior Subordinated Debt | Floating-Rate Debentures Due 2035 | Lower limit
Debt Instrument
Interest rate (as a percent)		1.62%
Subsidiaries | Junior Subordinated Debt | Floating-Rate Debentures Due 2035 | Upper Limit
Debt Instrument
Interest rate (as a percent)		1.89%

[1] Includes $24 and $55 of other short-term investments, $322 and $756 of portfolio loans and leases, $(2) and $(7) of ALLL, $2 and $5 of other assets, $1 and $2 of other liabilities and $263 and $656 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2021 and 2020, respectively. For further information, refer to Note 12.